What security system did Atalla patent in 1972?
Firewall
PIN security system
SSL
VPN
Answer
The PIN security system, patented by Atalla in 1972, revolutionized electronic transactions. This system introduced the concept of a Personal Identification Number (PIN) as a secure method of verifying a user's identity. PINs are typically four to six digits long and are entered on a keypad to access accounts or perform transactions.
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